Widespread WFH policies have basically become a backdoor way to get at social changes in working habits that some have advocated for decades. Something more akin to European practices. We all know they guy logging 8-10 hour days WFH is not actually working that much. We all know it, don't deny it. There is also downtime in the office too, of course. And removing commutes has made some people more productive early and late in the day, in my experience. I have noticed it with a few employees.
I'm not a big fan of it still for junior employees. The 18-25 cohort has really been struggling from what I have seen. It's hard to learn the ropes over the phone during telecons and Teams meetings. They just never really become a part of the team workflow and usually end up sitting around in the background.
The quality of work products for anything that requires collaboration and iteration between teams has taken a hit. Those sorts of activities take a lot longer to complete now. A giant phone call with 20 people is a lot harder to manage than in an in-person meeting of the same size. Solitary work is fine with WFH.
Like most things, WFH has good and bad aspects. I would say 75% of my staff would prefer to be back in the office at this point, and that includes some more junior staff who some would assume would only want WFH. I think we lose sight of the fact that work was often the number 1 place that people socialized and that has been cut off for many people. Leads to isolation. Young people can easily spend days and days barely ever leaving the house if they don't go to work. That's unhealthy, but that kind of behavior has literally been encouraged and/or mandated for 2 years now...